| Abstract |
| One of very important subjects in drinking water field would be in the effective removal of NOM in the water treatment plant. In this study, therefore, removal efficiencies of fulvic acid and humic acid by coagulation were evaluated under given jar test condition. Fulvic acid and humic acid used in this work were isolated from sediment of Daecheung lake. Taejeon. Model raw waters were prepared in the DOC concentrations of 3.6, 7.2㎎/ℓ for a fulvic acid and 4.6, 9.4㎎/ℓ for a humic acid. As coagulants AS and PAC were used and dosed in 1∼6㎖/ℓ at 20℃. Water samples were analyzed in the terms of pH, turbidity(NTU), DOC(㎎/ℓ) and UV_(254)(㎝^(-1)). As the results from the work under a given condition, it was not easier to remove a fulvic acid by AS and PAC than humic acid. In case of using 6㎖/ℓ of PAC, maximum about 50% removal could be available. In the removal of humic acid, the efficiencies of about 90% were obtained by AS and PAC. The effective PH ranges were pH 5-6 in fulvic acid removals and pH 4.5-5.5 in humic acid removals. |
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| Key Words |
| coagulation, AS, PAC, humic acid, fulvic acid, turbidity, DOC. UV254 |
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